﻿using System;
using System.Collections.Generic;
using System.Text;
using System.Net;
using System.IO;

namespace msBsc.SvRef
{

    public class FtpUpDown
    {

        string ftpServerIP;

        string ftpUserID;

        string ftpPassword;

        string ftpCurrentlyDir = "";

        public string FtpCurrentlyDir
        {
            get
            {
                return ftpCurrentlyDir;
            }
            set
            {
                ftpCurrentlyDir = value;
            }
        }

        FtpWebRequest reqFTP;

        private void Connect(String path)//连接ftp
        {

            // 根据uri创建FtpWebRequest对象

            reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(path));

            // 指定数据传输类型

            reqFTP.UseBinary = true;

            // ftp用户名和密码

            reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);

        }

        public FtpUpDown(string ftpServerIP, string ftpUserID, string ftpPassword)
        {

            this.ftpServerIP = ftpServerIP;

            this.ftpUserID = ftpUserID;

            this.ftpPassword = ftpPassword;



        }

        //都调用这个
        private string[] GetFileList(string path, string WRMethods)//上面的代码示例了如何从ftp服务器上获得文件列表
        {

            string[] downloadFiles;

            StringBuilder result = new StringBuilder();



            try
            {

                Connect(path);

                reqFTP.Method = WRMethods;

                WebResponse response = reqFTP.GetResponse();

                StreamReader reader = new StreamReader(response.GetResponseStream(), System.Text.Encoding.Default);//中文文件名

                string line = reader.ReadLine();

                while (line != null)
                {

                    result.Append(line);

                    result.Append(" ");

                    line = reader.ReadLine();

                }

                // to remove the trailing ' ' 

                result.Remove(result.ToString().LastIndexOf(' '), 1);

                reader.Close();

                response.Close();

                return result.ToString().Split(' ');

            }

            catch  
            {

                //System.Windows.Forms.MessageBox.Show(ex.Message);

                downloadFiles = null;

                return downloadFiles;

            }

        }

        public string[] GetFileList(string path)//上面的代码示例了如何从ftp服务器上获得文件列表
        {

            return GetFileList("ftp://" + ftpServerIP + "/" + path, WebRequestMethods.Ftp.ListDirectory);



        }

        public string[] GetFileList()//上面的代码示例了如何从ftp服务器上获得文件列表
        {
            return GetFileList("ftp://" + ftpServerIP + "/", WebRequestMethods.Ftp.ListDirectory);
        }

        public void Upload(string Sourcefilename, string Destinationfilename) //上面的代码实现了从ftp服务器上载文件的功能
        {

            FileInfo dfileInf = new FileInfo(Destinationfilename);
            FileInfo sfileInf = new FileInfo(Sourcefilename);

            string uri = "ftp://" + ftpServerIP + "/" + Destinationfilename;

            Connect(uri);//连接          

            // 默认为true，连接不会被关闭

            // 在一个命令之后被执行

            reqFTP.KeepAlive = false;



            // 指定执行什么命令

            reqFTP.Method = WebRequestMethods.Ftp.UploadFile;



            // 上传文件时通知服务器文件的大小

            reqFTP.ContentLength = sfileInf.Length;



            // 缓冲大小设置为kb 

            int buffLength = 2048;



            byte[] buff = new byte[buffLength];

            int contentLen;



            // 打开一个文件流(System.IO.FileStream) 去读上传的文件

            FileStream fs = sfileInf.OpenRead();

            try
            {

                // 把上传的文件写入流

                Stream strm = reqFTP.GetRequestStream();



                // 每次读文件流的kb 

                contentLen = fs.Read(buff, 0, buffLength);



                // 流内容没有结束

                while (contentLen != 0)
                {

                    // 把内容从file stream 写入upload stream 

                    strm.Write(buff, 0, contentLen);



                    contentLen = fs.Read(buff, 0, buffLength);

                }



                // 关闭两个流

                strm.Close();

                fs.Close();

            }
            catch (Exception ex)
            {
                throw (ex);
            }

        }

       
        public bool Upload(string filename)
        {
            try
            {
                FileInfo fileInf = new FileInfo(filename);
                this.Upload(filename,  this.FtpCurrentlyDir + fileInf.Name);
            }
            catch
            {
                return false;
            }
            return true;
        }

        /// <summary>
        /// 发送文件到指定的目录下
        /// </summary>
        /// <param name="filename">生成到本机上的绝对文件名</param>
        /// <param name="address">要生成到的目录</param>
        /// <returns></returns>
        public bool UploadPointAddress(string filename,string address)
        {
            try
            {
                FileInfo fileInf = new FileInfo(filename);
                string Destinationfilename = address + fileInf.Name;
                File.Copy(filename, Destinationfilename,true);
            }
            catch (Exception e)
            {
                return false;
            }
            return true;
        }

        /// <summary>
        /// 上传
        /// </summary>
        /// <param name="strDescDir">目标目录</param>
        /// <param name="filename">本地文件路径</param>
        public bool UploadFile(string strDescDir, string filename)
        {
            FileInfo fileInf = new FileInfo(filename);
            string uri = "ftp://" + ftpServerIP + "/" + (strDescDir == string.Empty ? "" : strDescDir + "/") + fileInf.Name;
            FtpWebRequest reqFTP;
            reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri));
            reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);
            reqFTP.KeepAlive = false;
            reqFTP.Method = WebRequestMethods.Ftp.UploadFile;
            reqFTP.UseBinary = true;
            reqFTP.ContentLength = fileInf.Length;
            int buffLength = 2048;
            byte[] buff = new byte[buffLength];
            int contentLen;
            FileStream fs = fileInf.OpenRead();
            Stream strm = reqFTP.GetRequestStream();
            contentLen = fs.Read(buff, 0, buffLength);
            while (contentLen != 0)
            {
                strm.Write(buff, 0, contentLen);
                contentLen = fs.Read(buff, 0, buffLength);
            }
            strm.Close();
            fs.Close();
            return true;
        }


        public bool Download(string filePath, string fileName, out string errorinfo)/**/////上面的代码实现了从ftp服务器下载文件的功能
        {

            try
            {

                String onlyFileName = Path.GetFileName(fileName);

                string newFileName = filePath + "\\" + onlyFileName;

                if (File.Exists(newFileName))
                {

                    errorinfo = string.Format("本地文件{0}已存在,无法下载", newFileName);

                    return false;



                }

                string url = "ftp://" + ftpServerIP + "/" + fileName;

                Connect(url);//连接  



                reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);



                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();



                Stream ftpStream = response.GetResponseStream();



                long cl = response.ContentLength;



                int bufferSize = 2048;



                int readCount;



                byte[] buffer = new byte[bufferSize];



                readCount = ftpStream.Read(buffer, 0, bufferSize);

                FileStream outputStream = new FileStream(newFileName, FileMode.Create);



                while (readCount > 0)
                {

                    outputStream.Write(buffer, 0, readCount);



                    readCount = ftpStream.Read(buffer, 0, bufferSize);

                }



                ftpStream.Close();



                outputStream.Close();



                response.Close();

                errorinfo = "";

                return true;

            }

            catch (Exception ex)
            {

                errorinfo = string.Format("因{0},无法下载", ex.Message);

                return false;

            }

        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="filePath"></param>
        /// <param name="ftpChildPath">FTP子目录</param>
        /// <param name="fileName"></param>
        /// <param name="errorinfo"></param>
        /// <returns></returns>
        public bool Download(string filePath, string ftpChildPath, string fileName, out string errorinfo)/**/////上面的代码实现了从ftp服务器下载文件的功能
        {

            try
            {

                String onlyFileName = Path.GetFileName(fileName);

                string newFileName = filePath + "\\" + onlyFileName;

                if (File.Exists(newFileName))
                {

                    errorinfo = string.Format("本地文件{0}已存在,无法下载", newFileName);

                    return false;



                }

                string url = "ftp://" + ftpServerIP + "/" + ftpChildPath + "/" + fileName;

                Connect(url);//连接  



                reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);



                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();



                Stream ftpStream = response.GetResponseStream();



                long cl = response.ContentLength;



                int bufferSize = 2048;



                int readCount;



                byte[] buffer = new byte[bufferSize];



                readCount = ftpStream.Read(buffer, 0, bufferSize);

                FileStream outputStream = new FileStream(newFileName, FileMode.Create);



                while (readCount > 0)
                {

                    outputStream.Write(buffer, 0, readCount);



                    readCount = ftpStream.Read(buffer, 0, bufferSize);

                }



                ftpStream.Close();



                outputStream.Close();



                response.Close();

                errorinfo = "";

                return true;

            }

            catch (Exception ex)
            {

                errorinfo = string.Format("因{0},无法下载", ex.Message);

                return false;

            }

        }

        /// <summary>
        /// //删除文件
        /// </summary>
        /// <param name="fileName">包含目录的文件名,不含服务器地址</param>
        public void DeleteFileName(string strDescDir, string fileName)
        {

            try
            {

                FileInfo fileInf = new FileInfo(fileName);

                string uri = "ftp://" + ftpServerIP + "/" + (strDescDir == string.Empty ? "" : strDescDir + "/") + fileInf.Name;


                Connect(uri);//连接          


                // 默认为true，连接不会被关闭

                // 在一个命令之后被执行

                reqFTP.KeepAlive = false;



                // 指定执行什么命令

                reqFTP.Method = WebRequestMethods.Ftp.DeleteFile;

                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();


                response.Close();

            }

            catch (Exception ex)
            {
                throw (ex);
            }

        }

        //创建目录
        public void MakeDir(string dirName)
        {

            bool dirExist = false;

            string uri = "ftp://" + ftpServerIP + "/" + dirName;

            this.FtpCurrentlyDir = dirName + "/";

            Connect(uri);//连接       

            reqFTP.Method = WebRequestMethods.Ftp.ListDirectory;

            try
            {
                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
                response.Close();
                dirExist = true;
            }
            catch
            {
            }

            if (!dirExist)
            {

                Connect(uri);//连接       
                reqFTP.Method = WebRequestMethods.Ftp.MakeDirectory;

                try
                {
                    FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();

                    response.Close();
                }
                catch (Exception ex)
                {
                    throw (ex);
                }
            }

        }




        //删除目录
        public void delDir(string dirName)
        {
            try
            {
                string uri = "ftp://" + ftpServerIP + "/" + dirName;

                Connect(uri);//连接       

                reqFTP.Method = WebRequestMethods.Ftp.RemoveDirectory;

                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();

                response.Close();

            }

            catch (Exception ex)
            {
                throw (ex);

            }

        }

        //获得文件大小
        public long GetFileSize(string filename)
        {

            long fileSize = 0;

            try
            {

                FileInfo fileInf = new FileInfo(filename);

                string uri = "ftp://" + ftpServerIP + "/" + fileInf.Name;

                Connect(uri);//连接       

                reqFTP.Method = WebRequestMethods.Ftp.GetFileSize;

                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();

                fileSize = response.ContentLength;

                response.Close();

            }

            catch (Exception ex)
            {
                throw (ex);
            }

            return fileSize;

        }

        //文件改名
        public void Rename(string currentFilename, string newFilename)
        {



            try
            {

                FileInfo fileInf = new FileInfo(currentFilename);

                string uri = "ftp://" + ftpServerIP + "/" + fileInf.Name;

                Connect(uri);//连接

                reqFTP.Method = WebRequestMethods.Ftp.Rename;

                reqFTP.RenameTo = newFilename;



                FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();

                //Stream ftpStream = response.GetResponseStream();

                //ftpStream.Close();

                response.Close();

            }

            catch (Exception ex)
            {
                throw (ex);
            }

        }

        //获得文件明晰
        public string[] GetFilesDetailList()
        {

            return GetFileList("ftp://" + ftpServerIP + "/", WebRequestMethods.Ftp.ListDirectoryDetails);

        }

        //获得文件明晰
        public string[] GetFilesDetailList(string path)
        {

            return GetFileList("ftp://" + ftpServerIP + "/" + path, WebRequestMethods.Ftp.ListDirectoryDetails);

        }

    }
}
